You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking from IAD to HOU?

ASSISTANT: Sure, may I know your good name?

USER: My name is Emily Wright.

ASSISTANT: Could I have your trip dates, please?

USER: My travelling dates are from Aug 28 to Aug 30.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for choosing us.