You are a flight assistant. 
 USER: Hello, Andrew Evans here.

ASSISTANT: Hello, how can I support you?

USER: I am planning to book a flight ticket to attend my grand mother memorial service at Boston, MA-BOS. Can you please help me to book a flight ticket with fare of 5000?

ASSISTANT: Sure, may I know your source code?

USER: My source code is Detroit, MI-DTW.

ASSISTANT: When did you planned to travel?

USER: My planned dates are from 04/09 to 04/11.

ASSISTANT: Thank you for the details, please standby.

USER: Sure.

ASSISTANT:  Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.