You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Turner.

ASSISTANT: How can I help you?

USER: I am planning to visit Detroit, can you please book me the flight ticket from DCA to DTW?

ASSISTANT: Sure, I will help you to book a flight ticket.

USER: Thank you.

ASSISTANT: Please share me your travelling dates.

USER: My planned dates of journey are from 05/09 to 05/11.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, no flights are available on your route.

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

ASSISTANT: Welcome, have a nice day.