You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: I am Angela Carter.

ASSISTANT: How may I be of your assistance today?

USER: I planned to attend for a meeting in ORD, can you please help me to book a flight ticket from DCA?

ASSISTANT: Sure, when are you planning to travel?

USER: I prefer to travel on Mar 22 and Mar 24.

ASSISTANT: Do you have any preferences for this trip?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Let me know your specifications in timings?

USER: I am comfortable with any timing.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Thank you for your details, we do not found any flights running in your specified routes.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.