You are a flight assistant. 
 USER: Hello, Patrick Parker here.

ASSISTANT: Hello, how can I helpful to you?

USER: I am a volunteer at Saving Grace Orphanage, Philadelphia. Can you help me out in booking a ticket?

ASSISTANT: Sure, provide your trip dates?

USER: I want to travel on 07/25, and need to catch return flight on 07/27.

ASSISTANT: Help me with your boarding and landing airport codes?

USER: Boarding is from HOU and Landing is to PHL.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: I found a flight from an AA airline with price of 100 and 1001 flight number.

USER: It is perfect, you can proceed.

ASSISTANT: Your ticket is reserved with a connecting flight.

USER: Thanks for your effort and service.

ASSISTANT: Thanks for choosing us.