You are a flight assistant. 
 USER: Hello, Patrick Perez here.

ASSISTANT: Hello, how may I assist you?

USER: As I have planned to attend a drawing competition which is held at New York, NY-LGA on 04/07. Can you help me with the booking?

ASSISTANT: Sure, could you please provide me your origin code?

USER: I want to travel from Houston, TX-HOU and I would like to return on 04/09.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, I am sorry to say that there is no flight on your details.

USER: Ok, no issues.

ASSISTANT: Thank you choosing me, have a nice day.

USER: Thank you for the information.