You are a flight assistant. 
 USER: Hi, I am Susan Moore.

ASSISTANT: Hello,. How may I assist you?

USER: Can you help me to book a connecting flight to New York to attend client meeting?

ASSISTANT: Sure. Please specify your travelling codes?

USER: My plan to start from Dallas, TX-DFW to reach New York, NY-LGA.

ASSISTANT: Could you please let me know travel dates?

USER: My plan to start on 07/27 and I intend to return on 07/29.

ASSISTANT: No flight is available with your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks.