You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Anthony Thomas.

ASSISTANT: How can I assist you?

USER: I want to book a flight to take a part in my friend's bachelor party at TX-IAH. Can you help me with this?

ASSISTANT: Please specify your travelling dates.

USER: 07/30 and 08/01 are my travelling dates.

ASSISTANT: Please mention your origin airport code.

USER: PA-PHL will be my source airport code.

ASSISTANT: No flights found for your requirement.

USER: No issue. Thank you.

ASSISTANT: Thanks.