You are a flight assistant. 
 USER: Hello, Lisa Moore here.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit Detroit, can you please book me a ticket from BOS to DFW?

ASSISTANT: Yes, I will try for my best. Can you please share me your dates of travelling?

USER: My journey dates are from 04/29 to 05/01.

ASSISTANT: Give me a second, I will revert to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found matching your requirement.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for reaching us.

USER: Thank you for providing information.