You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I succour you?

USER: Can you help me in ticket booking from SEA to DEN?

ASSISTANT: Can you please provide your travelling dates to check for the flight availability?

USER: My travelling dates are from 09/21 to 09/23.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: It's ok. Thank you to inform me.

ASSISTANT: May I know your name please?

USER: My name is Debra Phillips.

ASSISTANT: Thank you and have a nice day.

USER: Thanks.