You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patrick Wright.

ASSISTANT: Please tell me, how may I assist you?

USER:  I am planning to travel from DEN to DCA to attend my sister's wedding, could you please help me with booking a flight ticket?

ASSISTANT: Sure. On which date you want to travel from DEN?

USER: My dates of travel are from 01/29 to 01/31.

ASSISTANT: Ok. Sorry. I have failed to search a flight as per your details.

USER: That's so sad to hear. I will travel by any other means.

ASSISTANT: Ok.

USER: Thank you for your time.

ASSISTANT: You are welcome.