You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I assist you?

USER: Can you please help me in booking my flight ticket from Houston IAH?

ASSISTANT: Sure. Please provide your travel dates?

USER: My travelling dates are 04/28 and 04/30.

ASSISTANT: Could you help me with boarding airport code?

USER: My destination airport code is SFO.

ASSISTANT: Ok. Please provide connections limit?

USER: Ok, I need 1 connection flight ticket.

ASSISTANT: I regret, no flight found.

USER: Ok, fine.

ASSISTANT: Please provide your name?

USER: Myself Michelle Thompson.

ASSISTANT: Thanks.

USER: Thank you for your help.