You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Andrew Robinson here.

ASSISTANT: How can I assist you?

USER: Can you please book me a ticket from DFW to LGA?

ASSISTANT: Can I know your travel dates?

USER: Sure, here are my preferred travelling journey dates 07/24 and 07/26.

ASSISTANT: The flight 1015 of Delta airlines is available on you request with 0 connection. Shall I proceed?

USER: Please check with 1 connection flight.

ASSISTANT: Sorry Andrew, there is no flight available on your request.

USER: No issues, thank you for your valuable time.

ASSISTANT: You are welcome.