You are a flight assistant. 
 USER: Hi, I am Margaret Scott.

ASSISTANT: Hello, how may I be of your helping hand today?

USER: I need to travel in a direct flight to reach Denver as soon as possible. Can you please aid me in booking a ticket?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you please help me with providing your corresponding airport codes?

USER: My corresponding airport codes are DC-DCA and CO-DEN.

ASSISTANT: When would you like to make your  journey?

USER: My travel dates are from 11/19 to 11/21.

ASSISTANT: Thank you for sharing your details, please stand by, I will check with the airlines and get back to you.

USER: Ok.

ASSISTANT: We are sorry to notify that, there are no flights are available based on your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.