You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Rodriguez from Dallas.

ASSISTANT: How may I guide you today Rodriguez?

USER: I am an radar engineer, unfortunately Washington second terminal was damaged so I need to solve this problem for that purpose I need to go to there so can you please book a flight ticket for me?

ASSISTANT: Sure, I am blissful to help you. Can you please provide your planned itinerary dates of travelling?

USER: Thank you for accepting my request, I want to take off on 08/23 and please confirm my return ticket also on 08/25.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I would like to fly from DFW and destination airport is IAD.

ASSISTANT: Please wait a moment to check the flights availability in your route.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: Oh! It's ok no problem, I will contact another airline agency. Thank you for your information.

ASSISTANT: Thank you for opting our services, have a great day.