You are a flight assistant. 
 USER: Hello, I am Carol Davis.

ASSISTANT: Hello, How can I serve you?

USER: I would like to travel from San Francisco to Dallas & Fort Worth. Can you please hold me a flight ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: I want to start from CA - SFO to reach TX - DFW.

ASSISTANT: Please help me with your travel dates.

USER: My trip dates are 09/21 - 09/23.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for availing us.

USER: It's ok, I will check out with the another airline. Thank you for your information.