You are a flight assistant. 
 USER: Hi, I am Raymond Martin.

ASSISTANT: Hello, how may I assist you today?

USER: I want to go for Yosemite adventure at Seattle, WA-SEA, can you please book my ticket?

ASSISTANT: Sure, help me with the source code?

USER: My source code is Dallas, TX-DFW.

ASSISTANT: Can I have your trip dates?

USER: My journey dates are from 03/27 to 03/29.

ASSISTANT: Thank you for the details, we found that no flights were running at that locations.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.