You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Melissa Rodriguez. Can you help me booking a flight ticket from DFW to IAD?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I will start on Feb, 03 and return on Feb, 05.

ASSISTANT: Do you have any specifications?

USER: I need a break in my journey.

ASSISTANT: Is there any price limit?

USER: I can pay up to 200.

ASSISTANT: I am sorry to say that there is no flight found with that price.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.