You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Timothy Thompson.

ASSISTANT: Good morning Thomson.

USER: My date of journey is on 12/24, and I will be back on 12/26. Good morning.

ASSISTANT: Sure, I will help you with booking. Can you please provide me airport codes?

USER: My travel airport codes are  from PHL to IAD.

ASSISTANT: Ok, please wait a moment let me check for flight availability.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. I have found a flight in Delta airlines with connection 1, shall I go with booking?

USER: I need to travel in direct flight.

ASSISTANT: Sorry Thomson, no flight is available to you with connection 0.

USER: That's fine. thank you for your information.

ASSISTANT: Most welcome. Thank you for choosing us.