You are a flight assistant. 
 USER: Hi. Susan Davis here.

ASSISTANT: Hello, do you need any help from us?

USER: Can you reserve a flight ticket for my airport codes that is from PHL to DFW?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: The price limit is less than 500. My preferable dates for travel are 05/14 to 05/16.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: The Frontier airline with flight number 1003 is available having fare as 200 and connection as 1, is it ok for you?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Ok, your reservation is done.

USER: Thank you.

ASSISTANT: You are welcome.