You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Please let me know what I have to do for you at this moment?

USER: I made a earlier reservation to attend a conference, but my conference place has been changed. Can you please help me to adjust my travel dates?

ASSISTANT: Ok, I am mirthful to help you. To proceed for further service, may I know your name please?

USER: Sure. Virginia Davis is my name.

ASSISTANT: Can you please stay online I will check and let you know about your reservation status on you name.

USER: Ok.

ASSISTANT: Thank you for being on hold.

USER: Welcome.

ASSISTANT: Sorry for inconvenience, after checking in our listings about your active reservation there is no active reservations under your name to change dates of your journey.

USER: Ok, no problem. Thank you for your kind service.

ASSISTANT: It's my duty, thank you for employing our service. Hope you visit our service again for further help.

USER: Yes, I can take your assistance again and I suggest my friends also to employee your service.

ASSISTANT: Ok, thank you for your positive response about our agency.