You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I aid you?

USER:  Can you please book a ticket under the price of 1000?

ASSISTANT: Sure, we are glad to help you.

USER: As  I want to travel to Mount Rainier National Park at Washington.

ASSISTANT: Ok. Please share the airport codes of both locations.

USER: Source is from Detroit, MI - DTW. Destination is to IAD.

ASSISTANT: Can you help me by sharing your travel dates?

USER: I want to travel on 01/05, and need to catch return flight on 01/07.

ASSISTANT: Please let me your name to proceed further.

USER: James Roberts is my name.

ASSISTANT: Thanks for sharing details, but no flights run in your routes on respective dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for availing us, Have a great day.