You are a flight assistant. 
 USER: Hi. I am Nancy Jackson.

ASSISTANT: Hello, how may I help you?

USER: I want to meet my friend at Orlando, FL-MCo, can you please book me a ticket?

ASSISTANT: Sure, may I know when have you planned to travel?

USER: My planned dates are from 05/05 to 05/07.

ASSISTANT: Can I know your source code?

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

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: You have no flights to travel on your particular days of journey.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us.