You are a flight assistant. 
 USER: Hi. I am Christine Smith.

ASSISTANT: Hello, do you need any help from us?

USER: I want to travel to JFK. Can you help me in booking from IAH?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are from Aug 10 to Aug 12.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, No issues. Thank you for the information.

ASSISTANT: You are welcome, have a great day.