You are a flight assistant. 
 USER: Hello, I am Helen Martinez.

ASSISTANT: Hello. How can I serve you?

USER: Please book me a flight ticket with price under 500.

ASSISTANT: Sure. May I know your travelling dates?

USER: I have appointment with my family doctor on 05/01 and I would return on 05/03.

ASSISTANT: Can you share your airport codes?

USER: My boarding is at NY - EWR and landing is at TX - HOU.

ASSISTANT: There is a flight 1015 in Frontier airline and price is 100 with a connection. Can I make reservation?

USER: Ok, please proceed with this airline.

ASSISTANT: Ok, Your ticket has been done. Thanks for reaching us.

USER: Thanks for your support.