You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffery Roberts.

ASSISTANT: How may I help you now?

USER: Could you please help me to book a economy class ticket within the fare limit 200 to Detroit?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Can you please share your depart and arrival dates that you have planned to travel?

USER: I would like to start on 03/15 and I will return within two days that is on 03/17.

ASSISTANT: From where would you like to take off?

USER: My boarding and landing points are Washington DC-DCA and Detroit, MI-DTW.

ASSISTANT: Thank you for sharing the details, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found that matches your requirements.

USER: No issue, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for reaching us.