You are a flight assistant. 
 USER: Hello,. I am Benjamin Scott.

ASSISTANT: Hello, how can I help you today?

USER: I have a plan to visit the Cable car museum in San Francisco with my friends and helps to learn the new things. Could you please help me for booking a flight ticket?

ASSISTANT: Sure, help me with your travelling dates?

USER: I would like to travel on 09/15 and return on 09/17.

ASSISTANT: Ok, help me where do you want to travel?

USER: My airport codes are TX-IAH and CA-SFO.

ASSISTANT: Ok, any specifications?

USER: Price is below 5000. I need a halt.

ASSISTANT: Ok, please wait I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found on your given details.

USER: Ok, no issue. Thank you for your help.

ASSISTANT: Thanks for choosing us.