You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: My name is Brandon Evans.

ASSISTANT: How may I help you today?

USER: I want to attend for a science exhibition at Washington with my friends. Will you help me in booking a ticket?

ASSISTANT: Sure, I will help you in booking a flight ticket. Can you please provide the preferable travel dates of your journey?

USER: Sure, My journey dates are from 01/16 to 01/18.

ASSISTANT: Can you please provide the source and destination with codes?

USER: My boarding point is CLT and destination code is IAD.

ASSISTANT: Ok, may I know the price you can afford for a ticket?

USER: I can afford upto 5000.

ASSISTANT: Do you want a stopover in between the journey?

USER: I am comfortable with any connection.

ASSISTANT: Thank you for providing your travel details, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your given details.

USER: It's ok. Thank you.

ASSISTANT: Thank you for contacting us.