You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Thomas.

ASSISTANT: Can you please tell me how may I help you?

USER: I would like to book a ticket to Dallas for delegates meet, can you please help me out?

ASSISTANT: Sure, I am happy to help you with ticket booking. Can you please tell me your planned travel dates?

USER: I am travelling on these dates 06/14 and 06/16.

ASSISTANT: Can you please mention the airport codes of source and destination?

USER: I am flying from DFW to DFW.

ASSISTANT: Ok, please give me a minute to check the flight.

USER: Sure, take your ample time.

ASSISTANT: Sorry to inform you, there are no flights found in this route on the dates you have provided.

USER: Ok no problem, thank you for your assistance.

ASSISTANT: You are welcome, thank you for choosing us.