You are a flight assistant. 
 USER: Hello. I am Ryan Collins.

ASSISTANT: Hello, how can I help you?

USER: I need to attend a conference meeting which is held at Houston, can you help me with booking  from San Francisco SFO?

ASSISTANT: Sure, I am willing to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates please?

USER: My travelling dates are 11/06 to 11/08.

ASSISTANT: Ok, please share your destination point.

USER: My destination airport code is Houston IAH.

ASSISTANT: Do you need any connection in between the journey?

USER: I am comfortable with any connection.

ASSISTANT: How much you can pay for this ticket?

USER: I can spend up to 5000 for my flight ticket.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, sorry to inform we didn't find any flight with your details.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us, have a nice day.

USER: Thank you for your assistance.