You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Please help me book a connecting flight to Houston.

ASSISTANT: Could you please provide me your airport codes?

USER: My codes are LGA and IAH.

ASSISTANT: May I know your travel dates?

USER: I would like to travel on 09/13 and 09/15.

ASSISTANT: May I know your price limit?

USER: Sure, it should be within 200.

ASSISTANT: Sorry for the inconvenience, no flight found with your requirement.

USER: My name is David Roberts and thank you for your response.

ASSISTANT: Thanks for reaching us, have a good day.