You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please help me in booking a flight ticket to DCA from SEA?

ASSISTANT: Yes, I will definitely try my best to help you in booking your flight ticket. Could you please provide your planned dates of journey?

USER: My travel dates are from Apr 29 to May 01.

ASSISTANT: Do you have any limit on number of connections?

USER: I need a connecting flight.

ASSISTANT: May I know about your other requirements for the journey?

USER: I do not have any other specifications.

ASSISTANT: Let me know your good name to proceed further for documentation purpose.

USER: I am Anna Walker.

ASSISTANT: Sorry for the inconvenience, we have not found any flights running on your desired dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.