You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Williams here.

ASSISTANT: How may I help you?

USER: I would like to visit Dallas for a business meet, can you please reserve a flight ticket from LGA to DFW?

ASSISTANT: I am willing to help you, may I know your travelling dates?

USER: Thank you, my departure is on Jan 10 and please book my return ticket also on Jan 12.

ASSISTANT:  May I know your preferable journey timings?

USER: I would like to return in afternoon time.

ASSISTANT: Is there any another specifications on your trip, so that I can arrange like that only.

USER: I will prefer single connection for my journey.

ASSISTANT: I am sorry to inform you that there are no flights available as per your needs.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thanks for choosing us.

USER: Thank you for the information.