You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen Davis here.

ASSISTANT: How can I help you?

USER: I want to travel from TX-IAH to NY-JFK, to meet my childhood friend. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, help me with the travelling dates.

USER: My departure date is 07/19 and return date is 07/21. Make sure my connections limit is 1.

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

USER: So sad for that.

ASSISTANT: Thank you for opting us.

USER: Anyway, thank you for the information.