You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Justin Harris, I need to book a flight from NC - CLT to DC - IAD under a fare 5000. Can you help me with this?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: Kindly provide me your willing dates to travel.

USER: Sure, I am willing to travel on 04/12 and on 04/14.

ASSISTANT: Ok, give me sometime to find a right flight for you.

USER: Ok, take your own time.

ASSISTANT: Thank you for waiting, sorry we are unable to provide you flight on your given dates due to bad weather on your route.

USER: Ok, no problem. Anyhow thanks for your kind information.

ASSISTANT: Thank you for contacting us.