You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Wilson here.

ASSISTANT: How may I assist you?

USER: I am looking for a direct flight for my journey because of some emergency, can you please reserve a flight ticket between DEN and LGA?

ASSISTANT: Sure, I will help you. When would you like to plan your journey?

USER: Thank you, my departure is on May 20 and please book my return ticket also on May 22.

ASSISTANT: Do you need a connecting flight or a direct flight?

USER: I will prefer direct flight for my journey.

ASSISTANT: May I know your arrival and departure timings?

USER: I would like to departure in afternoon time.

ASSISTANT: Do you have any other preferences?

USER: No, I don't have any other preferences.

ASSISTANT: Jason Wilson, no flights has been found on your planned travel dates.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.