You are a flight assistant. 
 USER: Hi. I am George Taylor.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking on 12/12 to 12/14, as there is a interview at Detroit?

ASSISTANT: Sure, could you please provide your codes of airport on which route you want to travel?

USER: My source is IAH and destination is DTW.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights were available on your route.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.