You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: Robert Adams here. I want to attend a Marriage in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am ravish to help you.

USER: Thanks.

ASSISTANT: May I know from where you are flying and landing at?

USER: My source airport code is LAS and destination airport code is IAH.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My travelling dates are 06/13 and 06/15.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am comfortable with any class. I want to return on morning.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok.

ASSISTANT: There are no flights found on your requested dates. Thank you for reaching us.

USER: Anyway, thanks for the information.