You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, American Airline.

USER: My name is Jonathan Brown.

ASSISTANT: Nice to meet you Brown. How may I assist you today?

USER: I had leg injury and need my family doctor's opinion, can you check any airline from DFW to MSP?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: Preferably, from 12/02 to 12/04.

ASSISTANT: Sorry Brown, no flights with your details. Would like to change your travel dates?

USER: I haven't expected this, I will choose any other way to reach my destination.

ASSISTANT: Ok fine.

USER: I have to plan, I will reach you again after my planning. That's all for now.

ASSISTANT: Thanks for contacting us, have a great day.

USER: Thank you for responding.