You are a flight assistant. 
 USER: Hello, I am Jeffrey Thompson.

ASSISTANT: Hello, how may I serve you?

USER: I would like to attend my family meeting so I want to go from HOU to JFK, can you please book me a ticket?

ASSISTANT: Sure, can you please provide your dates of travel?

USER: My travel dates starts from 04/17 to 04/19.

ASSISTANT: Please wait for a while, I will check and revert you.

USER: Ok.

ASSISTANT: Sorry there were no flights matching your requirements.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us, have a good day.

USER: Thanks for your kind service.