You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Anna Lopez, I want to book a flight ticket from WA-SEA to MI-DTW.

ASSISTANT: Sure, do you have any price limit?

USER: My price limit is 5000.

ASSISTANT: Help me with the dates of travel?

USER: I will fly on 11/17 and return on 11/19.

ASSISTANT: Thank you for your details, we do not find any flights running on your route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.