You are a flight assistant. 
 USER: Hello, I am John Miller.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from WA-SEA on 05/27 to meet my uncle.

ASSISTANT: Sure, please let me know your return dare?

USER: Sure, I intent to return 05/29.

ASSISTANT: Kindly mention me your destination code?

USER: I want to head to Chicago, IL-ORD.

ASSISTANT: Thanks for your details. Sorry, there are no flights with your specifications.

USER: No problem, thank you for your help.

ASSISTANT: Thank you for reaching us.