You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Is this Global travel agency?

ASSISTANT: Yes, your at right place.

USER: Edward Turner here.

ASSISTANT: How can I help you today Edward?

USER: I got a seat in university of California and I got an joining letter on the date of 01/28, can you please help me in booking a ticket from LAS to LAX.

ASSISTANT: That's great, I will help you in booking flight ticket.

USER: Ok.

ASSISTANT: When would like to return LAS, for booking return flight ticket?

USER: The travelling dates are from 01/27 to 01/29.

ASSISTANT: Sure, just give me a moment, I will check is there any flight available or not.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, no flights available as per your requested dates.

USER: That's ok, thank you fore your information.

ASSISTANT: Do you want to know any thing else from us?

USER: No, thank you.

ASSISTANT: Thank you for choosing us, have a nice day Edward.

USER: Most welcome.