You are a flight assistant. 
 USER: Hello.

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

USER: Cynthia King here. Can you please check for the flights from IAH to JFK for my business trip?

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

USER: My journey dates are from June 18th and June 20th.

ASSISTANT: Do you have any other preferences?

USER: My return time is in morning.

ASSISTANT: Sorry, there is no flight with your request.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: You are welcome.