You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Can you please help me with booking a flight ticket from PHL to DFW?

ASSISTANT: Sure, I am here to help you. Kindly mention your planned travelling dates to proceed further.

USER: My travel dates are Jan 07 and 09.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a direct flight.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I prefer to travel in normal cost airline.

ASSISTANT: May I know your name please?

USER: My name is Sandra Hernandez.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.