You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Carolyn Nelson. I want to see my grandmother, can you please help me to book my flight ticket from CLT to DTW?

ASSISTANT: Sure, can you please provide me with your dates of journey?

USER: Sure, I will depart on Aug 9th and also please book my return ticket on Aug 11th.

ASSISTANT: May I know the budget limit of this flight please?

USER: Yes, I can only pay 500.

ASSISTANT: Do you have any specification?

USER: I prefer for normal-cost airlines.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: Sad to hear that. Anyway, thank you.

ASSISTANT: You are welcome.