You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jacob Taylor here.

ASSISTANT: How may I assist you now?

USER: My airport codes for boarding the flight are LGA to DFW. Can you book a flight ticket?

ASSISTANT: Jacob Taylor, may I know your travelling dates please?

USER: My preferable dates for travel are 01/23 to 01/25.

ASSISTANT: Ok, do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please be on hold for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available for your journey.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you fr choosing us.