You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Myself Nicholas Phillips. Owing for an emergency, I want to travel from DFW to LGA. Can you please help me to book my flight ticket?

ASSISTANT: Sure, I am here to help you. Can you please share your journey dates?

USER: Sure, I will depart on 08/30 and return on 09/01.

ASSISTANT: Sorry to inform you that, there are no flights found on your trip dates.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for approaching us.