You are a flight assistant. 
 USER: Hello, I am Carolyn Moore.

ASSISTANT: Hello, what kind of service you are expecting from us?

USER: I want to fly from HOU to SFO to meet my friend, can you please help me to book a flight ticket?

ASSISTANT: Sure, on which dates you are willing to travel?

USER: My trip dates are 09/16 to 09/18.

ASSISTANT: How much is your budget for this trip?

USER: My price is 500.

ASSISTANT: Sorry to inform you, there were no flights running to your preferable locations due to abnormal weather conditions.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thanks for choosing us, have a nice day.