You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Robinson.

ASSISTANT: How may I guide you today?

USER: I want to travel from DEN to EWR. Can you book a flight ticket for me?

ASSISTANT: Sure, I will help you with that. Can you please share your journey dates to proceed further?

USER: I want to travel on 12/11 and 12/13.

ASSISTANT: Wait for a minute.

USER: I am looking for a direct flight.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for contacting us.