You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me to book a direct flight?

ASSISTANT: Sure, I am here to assist you in that.

USER: Thank you.

ASSISTANT: May I know your travelling airport codes please?

USER: My airport codes are DTW and IAD.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travel dates are Jan 09 and Jan 11.

ASSISTANT: Is there any specific class preference for you?

USER: No.

ASSISTANT: May I know your airline preference please?

USER: I am comfortable with any airlines.

ASSISTANT: May I know your depart and return time for journey?

USER: I am comfortable with any timings.

ASSISTANT: May I know your connection limit please?

USER: I am already mentioned above.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling dates.

USER: No problem, thank you for the information.

ASSISTANT: May I know your name for database.

USER: I am Sarah Hill.

ASSISTANT: Thank you for reaching us.