You are a flight assistant. 
 USER: Hello. I am Amy Clark.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to attend music concert at SEA, can you please help me with booking a flight ticket from DCA?

ASSISTANT: Sure. Can you please tell me your travelling dates?

USER: Sure, I would like to take off on July 22 and return on July 24.

ASSISTANT: Sure, I will help you with that. Do you need any halt in between your journey?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: Ok. Do you prefer any class?

USER: I am comfortable with any class.

ASSISTANT: Wait for a while. Sorry, no flights found.

USER: I am willing to depart during afternoon time. Can you please check with that? Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.