You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from San Francisco SFO to Houston HOU. Can you find a flight ticket for me?

ASSISTANT: Please help me with your travelling dates?

USER: Sure, my planned trip dates are on Sept 10 and return on Sept 12.

ASSISTANT: Is there any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No, I don't have any other requirements.

ASSISTANT: Can you please share me your name?

USER: Ok, I am Robert Miller.

ASSISTANT: There are no flights running currently with your specified dates to travel.

USER: Ok, no problem, thank you for your help.

ASSISTANT: Thank you for reaching us.