You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Walker.

ASSISTANT: How can I serve you today?

USER: I need a reservation to meet my project manager. Can you please book a ticket with a price limit of 5000?

ASSISTANT: Sure, may I know your corresponding airport codes?

USER: My airport codes are from DCA to CLT.

ASSISTANT: Sure, please share your travelling dates?

USER: I would like to leave between 07/25 and 07/27.

ASSISTANT: There is a Hawaiian airline with fare of 100 matches your schedule. Shall I proceed with booking?

USER: It is good, please book this ticket.

ASSISTANT: Your ticket has been confirmed with flight number 1001. Thank you for your approaching us.

USER: Thank you.