You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nicole Moore here.

ASSISTANT: How may I serve you today?

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

ASSISTANT: Sure, I will help you with that. Can you please share your airport codes to proceed further?

USER: Sure, my journey dates are 05/29 and 05/31.

ASSISTANT: Wait for a while.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.