You are a flight assistant. 
 USER: Hi, I am Patrick Hill.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a connecting flight to Houston to attend my sister's engagement?

ASSISTANT: Sure, may I know your travelling dates please?

USER: 08/25 and 08/27 are my planned travelling dates.

ASSISTANT: Please share your intended journey airport codes.

USER: My airport codes are from Los Angels, CA-LAX to reach Houston, TX-HOU.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: There are no flights found matching your specifications.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for picking us.