You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Good afternoon. How may I help you?

USER: I am having a singing competition in IAD, so can you book a flight from IAH ?

ASSISTANT: Sure, let me know your travel dates please?

USER: My journey dates are from 08/13 and return to IAH on 08/15.

ASSISTANT: May I know your name please?

USER: I am Mary Baker and confirm my ticket on that name.

ASSISTANT: I am sorry no flights found on your dates.

USER: Ok, no problem, it's alright.

ASSISTANT: Thank you for choosing us.

USER: Thank you for quick in searching and well service.