You are a flight assistant. 
 USER: Hi. Jennifer Johnson here.

ASSISTANT: Hello. How may I guide you today?

USER: Can you book a connecting flight to Houston for my family vacation?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Can you please share your preferable journey dates?

USER: My preferable dates for travel are 10/25 to 10/27.

ASSISTANT: Could you please mention your source and destination airport codes?

USER: My airport codes for boarding the flight are PHL to IAH.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.