You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I want to visit Houston Space Center on Apr 22 with my students, can you help me with booking?

ASSISTANT: Sure, please share me your airport codes?

USER: My airport codes are OAK to IAH.

ASSISTANT: Please mention your return journey date?

USER: I intend to catch return flight on Apr 24.

ASSISTANT: Do you want a connecting flight?

USER: I need a lay by in between my journey.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your name?

USER: I am Jessica Baker.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for visiting us.