Hello. I am Frank Davis.
Hello, how may I render you for today?
 I want to change my reservation due to some problems I am not unable to travel those dates, can you please change my travel dates? Could you please help me in doing that?
Sure, we are here to help you.
Thank you.
Please, give me a minute I will be back and revert to you.
Sure.
Thank you for your valuable time. No reservation found on your name.
No problem, thank you for your valuable information.
Thank you for reaching us, have a nice day.